Rates of Reaction

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst

• product

• reactant

• solute

Tags

NGSS.HS-PS1-5

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium

• cut up the strip of magnesium

• increase the concentration of the hydrocholoric acid

• increase the temperature of the hydrocholoric acid

Tags

NGSS.HS-PS1-5

Which of the following would increase the rate of CO2 made using marble chips and HCl?

• Lowering the temperature

• Crushing the marble chips

• Using less acid

• Using bigger marble chips

Tags

NGSS.HS-PS1-5

Which colour on the graph would represent the solution with the higher temperature?

• Red

• Blue

• None

• Both

Tags

NGSS.HS-PS1-5

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur

• The minimum amount of energy needed for a reaction to potentially occur

• The energy added by a catalyst

• The energy possessed by the products

Tags

NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Increases the frequency of collisions? (select all correct)

• Increasing Temperature

• Increasing Concentration

• Increasing Surface Area

• Adding a Catalyst

• Increasing Pressure

Tags

NGSS.HS-PS1-5

Increases the number of successful collisions? (select all correct)

• Increasing Temperature

• Increasing Concentration

• Increasing Surface Area

• Adding a Catalyst

• Increasing Pressure

Tags

NGSS.HS-PS1-5

Catalysts ​ (a)   the rate of reactions by ​ (b)   the activation energy

• increase

• lowering

• decreasing

• raising

Select the box that represents what will happen to the activation energy when a catalyst is added

Tags

NGSS.HS-PS1-4